At least five people died in clashes on Friday as supporters of deposed President Mohamed Mursi mounted their boldest marches since troops crushed their protest camps demanding his reinstatement on August 14.

Barack Obama’s proposal to end a business tax break worth $72 billion is among the tensions the president may confront as he meets today with Senate Minority Leader Mitch McConnell in an effort to revive bipartisan talks over reducing the debt.

WASHINGTON — During a lengthy and at times emotionally wrenching news conference, Senator Dianne Feinstein of California on Thursday announced legislation that would ban the sale and manufacture of 157 types of semiautomatic weapons, as well as magazines holding more than 10 rounds of ammunition.

A new study from researchers at Tyndall National Institute and the National University of Singapore shows that subtle changes in the intermolecular van der Waals interactions in the active component of a molecular diode can improve the device performance by more than a factor of ten.